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i..'.r ENO sof TA Lr _....._ GROUND Z"O—ANALYSIS;-INC. !_TI, 9s 3422 W. Hammer Lane, Suite C-294 Stockton, California 95219 Telephone: (209) 952-3481 Facsimile: (209) 952-9891 March 17, 1995 Mr. Steven Sasson, Senior RENS San Joaquin County Public Health Services Environmental Health Division -PO Box 388 Stockton, California 95201 Subject: First Quarter 1995 Monitoring and Sampling at Nor Cal Beverage Company, 1800 East Fremont Street, Stockton, California Mr. Sasson: On February 28, 1995 Ground Zero Analysis, Inc. (Ground Zero) conducted groundwater monitoring and sampling for the first • rter 1995 at the Nor Cal Beverage Company site located at 180a 0 East Fremont Street in Stockton, California. Well MW-1 was monitored for depth to water and depth to bottom. The well was purged by bailing approximately three casing volumes of groundwater from the well. Electrical conductivity., pH, and temperature were monitored until these parameters stabilized during the purging process. Ground Zerofs field technician then collected a groundwater sample from the well and shipped the sample under chain-of-custody to Argon Labs of Ceres, California (DOHS certification # 1873) for analysis. The sample was analyzed for total petroleum hydrocarbons as gasoline (TPHg) using EPA Method 8015; and for benzene, toluene, ethylbenzene, and total xylenes (BTEX) using EPA Method 8020. The attached laboratory report indicates TPHg and BTEX were not detected in the groundwater sample collected from monitoring well MW-1. This is consistent with previous results. With this event we have completed the two additional rounds of sampling requested by San Joaquin County Public Health Services- Environmental Health Division prior to closure. A closure report is in preparation and will be submitted for your concurrence.